1).   Total expenditure on all these items in 1998 was approximately what percent of the total expenditure in 2002?

ANS: C - 69%

Required percentage
= [ (288 + 98 + 3.00 + 23.4 + 83)   x 100 ] %
(420 + 142 + 3.96 + 49.4 + 98)
 
= [ 495.4   x 100 ] %
713.36
  ~= 69.45%.